let common = {
  show() {
    // console.log('common', this)
    return this.name;
  }
};
let user = {
  // __proto__: common,
  name: "user",
  show() {
    // console.log('user', this)
    // return super.show();
    
    return this.name
  }
};
let admin = {
  __proto__: user,
  name: "admin",
  get() {
    // console.log('admin', this)
    return super.show();
  }
};
console.log(admin.get());
console.log(admin);